JPH06321546A - Method for stirring non-oxide glass melted liquid - Google Patents

Abstract

PURPOSE:To provide a method for uniformly stirring a non-oxide glass. CONSTITUTION:This method comprises hanging a chalcogenide glass-sealed container 1 in an oven 4, heating the chalcogenide glass with the oven 4 to form the melted liquid 6 of the chalcogenide glass, and giving vertical vibrations to the chalcogenide glass melted liquid with a vibrator 5 for the stirring of the chalcogenide melted glass.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for stirring a melt of non-oxide glass used in optical lenses and the like.

[0002]

2. Description of the Related Art Non-oxide glasses are oxidized in a non-oxidizing atmosphere or in a vacuum because they are oxidized when they are melted in air. For example, for stirring the chalcogenide glass melt, as shown in FIG. 3, after placing the raw material in the quartz ampoule container 1 and vacuum-sealing the mixture, the ampoule holder-2 in the heating furnace 9 to which the rocking power unit 8 is attached is placed. The container 1 is inserted, and 6 is about 500 gr. With the chalcogenide glass melt of (1), stirring was performed while rocking in the lateral direction about 1 reciprocation / sec.

[0003]

However, the above stirring method has a problem that uniform stirring that can be used for an optical lens or the like cannot be performed.

The present invention solves the above-mentioned conventional problems, and an object thereof is to provide a method for uniformly stirring a non-oxide glass melt.

[0005]

In order to achieve this object, the stirring method of the non-oxide glass of the present invention is carried out by suspending the non-oxide glass in a heating furnace to suspend the non-oxide glass. A non-oxide glass melt is heated by a heating furnace, and the non-oxide glass melt is vertically vibrated by a vibrating device to be stirred.

[0006]

According to the above construction, the portion where the specific gravity of the melt is heavy and the portion where the specific gravity of the melt is light are easily stirred.

[0007]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a container of a quartz ampoule of 350 ml, in which Ge 20 atomic% and Se80 are contained.
Atomic% chalcogenide glass is 500 gr. It is enclosed. The container 1 is inserted into the ampoule holder-2 and is suspended in the heating furnace 4 via the spring 3. 5 is a heating furnace 4,
This is a vibrating device for applying vertical vibration to the chalcogenide glass melt 6 via the spring 3 and the container 1. In this embodiment, the temperature of the chalcogenide glass 6 is 950 ° C.,
By vibrating the range of 5 cm up and down twice every second by the vibrating device 5 and stirring for 4 hours, a galcogenide glass usable also as an optical lens was obtained. That is, a diameter of 60 mm,
Spot-shaped infrared rays (wavelength 10μ on a 5 mm thick glass plate)
The dispersion of the transmittance at 10 points for m) is 70 ± 2%
Met. On the other hand, it was 60 ± 10% in the conventional example.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings.

The present embodiment differs from the first embodiment of FIG. 1 in that an ultrasonic vibration device 7 is connected to the spring 3 instead of the vibration device 5 and vertical ultrasonic vibration is applied. The other configurations are the same as those in the first embodiment. The chalcogenide glass was heated to 950 ° C. in the same manner as in Example 1 and stirred for 3 hours while applying ultrasonic vibration in the vertical direction, whereby the same uniform galcogenide glass as in Example 1 was obtained.

Although chalcogenide glass was described in the examples, similar effects were obtained with non-oxide glasses such as fluoride glasses.

[0012]

As described above, according to the present invention, since the non-oxide glass melt is agitated by vertically vibrating it, it becomes easy to agitate the portion having a high specific gravity and the portion having a light specific gravity of the melt. A more uniform non-oxide glass is obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of an apparatus for carrying out a stirring method according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an apparatus for carrying out a stirring method according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of an apparatus for performing a conventional stirring method.

[Explanation of symbols]

 1 container 4 heating furnace 5 vibration device 6 non-oxide glass melt 7 ultrasonic vibration device

Claims (3)

[Claims] 1. A container in which a non-oxide glass is sealed is hung in a heating furnace, and the non-oxide glass is heated by the heating furnace to obtain a non-oxide glass melt, and the non-oxide glass is shaken by a vibrating device. A stirring method in which the glass melt is vertically vibrated to stir the non-oxide glass melt. 2. The stirring method according to claim 1, wherein the non-oxide glass is chalcogenide glass or fluoride glass. 3. The vibrating device is an ultrasonic vibrating device.
The stirring method described.